NonStop S-Series Planning and Configuration Guide (G06.25+)

Glossary
HP NonStop S-Series Planning and Configuration Guide—523303-015
Glossary-97
shell
shell. In the Open System Services (OSS) environment, a program that interprets
sequences of text input as commands. A shell can operate on an input stream, or it
can interactively prompt and read commands from a terminal.
shielded twisted pair (STP). A transmission medium consisting of two twisted conductors
with a foil or braid shield. Contrast with unshielded twisted pair (UTP)
.
shutdown file. A file invoked by the local operator or by another shutdown file that contains
commands to shut down system devices, communications lines, and system and
application software. Contrast with startup file
.
SID. See system image disk (SID) or source ServerNet ID (SID).
signal. The method by which an environment notifies a process of an event. Signals are
used to notify a process when an error that is not related to input or output has
occurred. See also Open System Services (OSS) signal
.
signal delivery. The time when Open System Services (OSS) takes the action appropriate
for a specific process and a specific signal.
signal generation. The time when an event occurs that causes a signal for a process.
signal handler. A function or procedure that is executed when a specific signal is delivered
to a specific process.
Signaling System Number 7 (SS7). The protocol used in public networks to establish
connections between switches.
signal mask. The set of signals that are currently blocked from delivery to a specific
process.
signal reference grid. A series of conductors, constructed of pure or composite metals (for
example, copper) with good surface conductivity. A superior signal reference grid is
installed on the subfloor of a computer room and connected to the raised-floor
structure to establish constant and equal potential for all equipment in the computer
room that is connected to it.
Simple Network Management Protocol (SNMP). An asynchronous request-response
protocol used for network management. SNMP originated as a means for managing
Transmission Control Protocol/Internet Protocol (TCP/IP) and Ethernet networks. OSM
and TSM packages can include an SNMP-compliant interface for communication
between the system console and HP NonStop™ S-series server.
single-high ServerNet adapter. A ServerNet adapter that occupies only the upper half of a
ServerNet adapter slot in an HP NonStop™ S-series server. Contrast with double-high
ServerNet adapter.
single-high stack. A stack that includes a base, a frame, and one system enclosure.
Contrast with double-high stack
.